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Simulation and Pilot Test of Membrane Process for FCC Gasoline Desulphurization

Author: LiuRongKun
Tutor: KongZuo
School: China University of Petroleum
Course: Chemical Engineering
Keywords: Pervaporation Gasoline desulfurization Simulation Pilot
CLC: TE624.5
Type: Master's thesis
Year: 2009
Downloads: 187
Quote: 0
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Abstract

Membrane gasoline desulfurization technology is a new gasoline desulfurization technology, with low investment and operating costs, can be modular design, easy zoom expansion and construction, etc., this much petrochemical industry attention. In this thesis pervaporation small scale experiments based pervaporation gasoline desulfurization by establishing mathematical model of the process was simulated. After using the established pilot plant for the pilot test, the actual effects of PEG / PVDF composite membrane desulfurization performance, and on the basis of the technology for the economic analysis. Through the optimization of operating conditions simulation study showed that: elevated temperatures caused by increased pressure on the membrane after the membrane performance degradation compensation effect is very obvious; improve the film can reduce the required operating parameters of the membrane area, but it will increase the vacuum system load and the condensation products of investment required penetration; certain range, low-sulfur product yield pressure drop as the film and the rear feed increases with temperature; high feed sulfur content and low sulfur content of the product mean separating a high degree of difficulty, the difficulty increases as the separation, the required membrane area is increased, and decreased product yield sulfur. The processing capacity of 1 BPD in the test apparatus for analog design. Can be predicted by the simulation results, when the original sulfur content of 1080μg / g, the target sulfur content of 500μg / g, the low-sulfur gasoline yield was 67%, the required membrane area of ??1.4 square meters. Using the established pilot plant for the pilot test. The optimum operating conditions for the pilot plant as follows: feed temperature 115 ℃; vacuum hood inner pressure 350 Pa; feed flow 25 L / h. The optimum operating conditions in the pilot test results showed that the yield of the product was maintained at 70% or more, the initial sulfur content of 1080μg / g and 500μg / g of gasoline, the sulfur content can be reduced, respectively, 400μg / g , 150μg / g. In 1000 consecutive hours of continuous operation, the film properties and stability. Through the feed through the sample and the entire sulfur analysis showed that PEG / PVDF composite membrane for the thiophene sulfur compounds, especially multi-substituted thiophenes with high enrichment factor. Through analysis of the hydrocarbon group composition, sulfur content of aromatics in the sample greatly reduced, olefins, isoparaffins and naphthenes are increasing. By analyzing octane, low sulfur samples with increasing depth desulfurization, increasing octane loss, and high-sulfur samples octane increased. In a pilot test on the basis of membrane technology for gasoline desulfurization economic evaluation, its main advantage is reflected in four aspects: First, a smaller loss of octane number; two hydrogen consumption is small; three is less loss of process gas ; Fourth unit cost and process of low energy consumption. For 1 million tons / year capacity of the membrane gasoline desulfurization technology, its unit cost is lower than the hydrodesulfurization of 30% -40%, and the annual saving operation and handling fee of 25%, indicating that membrane gasoline desulfurization technology has a good economy prospects.

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CLC: > Industrial Technology > Oil and gas industry > Oil, natural gas processing industry > Petroleum refining > The refining process > Refined treatment
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